… is from page 168 of Ludwig von Mises‘s 1951 essay “Profit and Loss,” as reprinted in the 2008 Liberty Fund edition of Mises’s 1952 collection, Planning for Freedom:
Practically everybody aims at improving the material conditions of his existence. Public opinion takes no offense at the endeavors of farmers, workers, clerks, teachers, doctors, ministers, and people from many other callings to earn as much as they can. But it censures the capitalists and entrepreneurs for their greed. While enjoying without any scruples all the goods business delivers, the consumer sharply condemns the selfishness of the purveyors of this merchandise. He does not realize that he himself creates their profits by scrambling for the things they have to sell.